Which Sumerian invention was based on their knowledge of astronomy?

Thomas jefferson was the president of the united states. first second third fourth

Which of the following world and national events led to a new view of people with disabilities in the us:     a.  world war i and ii veterans with disabilities returned home after the wars.b.  john f. kennedy was elected president and had a sister with a disability.c.  the civil rights and feminist movements.d.  all of the above.

What is one aspect of an interpretation of literature